The CREC Academy of Aerospace and Engineering in Windsor will be closed Friday because of a staffing shortage.
School officials said the shortage is "unexpected and unforeseen."
The day will be made up at the end of the school year, a spokesperson for CREC said. The school's last day will now be June 23.
The school is for students in sixth through twelfth grade.
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Many locations across the state are still seeing staffing shortages because of the pandemic.